This document discusses using SVG for electronic program guides (EPGs) that can display television programming information across multiple devices. It proposes transforming available EPG data into SVG and delivering it over Wi-Fi using either an AJAX or streaming approach. This would allow EPGs to be viewed graphically and interactively on devices like PCs, phones, and tablets. The document outlines work done in the PINGO project to implement this idea and generate SVG EPGs from broadcast TV signals, package them using 3GPP DIMS for streaming, and test the results on PCs and mobile phones. It also notes some interoperability and feature support limitations encountered.

1. Electronic Program Guides using SVG Cyril Concolato Jonathan Sillan SVG Open 2010

2. Context: Multimedia Convergent Technologies Audio/Video convergent codecs MPEG-4 AAC MPEG-4 AVC Convergent graphics SVG / HTML View graphically and media rich content (including TV programs) on many types of devices STB / TV PC Mobile phones / tablets page 1

3. Context: TV Evolution TV is becoming digital Many channels, many programs E.g. 2010/2011 Analog TV switch off in France Opportunity for more interactivity (e.g. HBBTV) Devices and networks are evolving TV connected to the Internet Mobile phones capable of receiving TV programs (3G) Mobile broadcast networks are being deployed Deployment costs Deep indoor penetration page 2

4. The PINGO Project Indoor redistribution of adapted TV signal DVB-T/-H/-SH reception Transcoding of A/V Transformation of EPG data Targets: PC, phones, tablets Principles Transformation of available EPG data into SVG Delivery over Wi-Fi using a Streaming or AJAX approach Adapted to different terminals iPhone, iPad, PC page 3

5. Electronic Program Guides page 4

9. DVB IP Data Casting (IPDC)

10. FLUTE Protocol (File Delivery)

11. XML (TV-Anytime …) page 5

12. Why use SVG ? SVG has interestingproperties Layout, gradients, animations, interactivity Audio/Video support (in Tiny 1.2) SVG isbecomingubiquitous in Browsers Mobile industryinterest (3GPP, OMA, ATSC-M/H) SVG extendedwith 3GPP DIMS canbestreamed page 6

13. Dynamic Interactive MultimediaScenes 3GPP Standard : TS 26.142 based on MPEG-4 LASeR Concepts SVG extensions Timed SVG updates: DOM insertion, removal, replacements Sent by a server or readfromtimed files Transported of SVG Updates for streaming, in MP4 files or over RTP streams page 7

14. Architecture of the system page 8 Demodulator A/V Transcoding Streaming RTP SVGGeneration DIMS Packaging AJAX/HTTP Web Server

15. AJAX Approach Traditional Pull method Programs are retrievedfrom the sources XML data files are stored on a Web server with an SVG harness The client periodicallyretrieves the XML and updates its display usingJavascript Pros/Cons Light server (XML generation + Web Server) Adaptation on the client Reduceddynamicity (layout and programs) page 9

16. Streaming / Broadcasting Approach Principles Programs are retrievedfrom one broadcast source Transformedinto SVG content Packagedinto 3GPP DIMS unit Streamed to the client over RTP Pros/Cons Reproduce the behavior of TV broadcastchannels Programs are displayedincrementally as soon as they arrive Lighter client (JavaScript only for navigation) Heavier server Increasedbandwidth More difficult to adaptat to devicefeatures page 10

17. Implementation details Server Embedded platform ARC Processor @ 400 MHz Video transcoding chip Clients Streaming: GPAC on PC and Mobile phone (ARM 200MHz) AJAX: Firefox, Opera, Chrome, Safari (PC & iPhone/iPad) page 11

18. PINGO Results (PC) page 12

19. PINGO Results page 13

20. Demo Online Web Site (to beannounced) Video on iPad page 14

21. Problems and limitations Interoperability SVG Tiny 1.2 not widelysupported textArea (replaced by foreignObject + HTML div+CSS  ) Trait Access API (usedfallback DOM access) SVG videoelement (replaced by HTML5 element) Events on mobile devices vs. PC (e.g. touchEvent) Lack of SVG support on the Androidplatforms Lack of DIMS support Missing SVG features Screen orientation detection Pixel densitydetection Textellipsis (‘…’) Z-order SVG Features not useful: nav-* page 15

22. Merci de votre attention Questions ?